 /*******************************************************************************
  * Copyright (c) 2000, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.core.internal.plugins;

 import java.io.IOException ;
 import java.net.*;
 import org.eclipse.core.internal.runtime.InternalPlatform;
 import org.eclipse.core.runtime.ILibrary;
 import org.eclipse.core.runtime.Platform;
 import org.osgi.framework.Bundle;

 public class PluginClassLoader extends URLClassLoader {
     private Bundle bundle; //We should be able to get rid of this field, since the info is in the descriptor
 private PluginDescriptor descriptor;

     PluginClassLoader(PluginDescriptor descriptor) {
         super(computeURLs(descriptor));
         this.descriptor = descriptor;
         this.bundle = InternalPlatform.getDefault().getBundle(descriptor.getUniqueIdentifier());
         if (bundle == null)
             throw new IllegalArgumentException ();
     }

     private static URL[] computeURLs(PluginDescriptor descriptor) {
         Bundle bundle = InternalPlatform.getDefault().getBundle(descriptor.getUniqueIdentifier());
         if (bundle == null)
             throw new IllegalArgumentException ();

         ILibrary[] libs = descriptor.getRuntimeLibraries();
         String [] devPath = computeDevPath(bundle);
         URL pluginBase = descriptor.getInstallURL();
         try {
             pluginBase = Platform.resolve(descriptor.getInstallURL());
         } catch (IOException e1) {
             //Ignore
 }

         URL[] urls = new URL[devPath.length + libs.length];
         int j = 0;
         for (int i = 0; i < devPath.length; i++) {
             try {
                 urls[j++] = new URL(pluginBase, devPath[i]);
             } catch (MalformedURLException e) {
                 //Ignore the exception
 }
         }
         for (int i = 0; i < libs.length; i++) {
             try {
                 urls[j++] = new URL(pluginBase, libs[i].getPath().toOSString());
             } catch (MalformedURLException e) {
                 //Ignore the exception
 }
         }
         return urls;
     }

     private static String [] computeDevPath(Bundle bundle) {
         if (!DevClassPathHelper.inDevelopmentMode())
             return new String [0];

         String pluginId = bundle.getSymbolicName();
         if (pluginId == null)
             return new String [0];
         return DevClassPathHelper.getDevClassPath(pluginId);
     }

     protected Class findClass(String name) throws ClassNotFoundException {
         return bundle.loadClass(name); // if no CNFE is thrown, activate the bundle (if needed)
 }

     public URL findResource(String name) {
         return bundle.getResource(name);
     }

     public PluginDescriptor getPluginDescriptor() {
         return descriptor;
     }
 }

